- He left no note or letter, no explanation of any sort?
- None. Whatever drove him to it, he took the secret with him.

7 seconds sound clip from the The Picture of Dorian Gray movie soundboard.

You can hear this line at 01:25:02.360 in the Blu-ray version of the movie.

Quote context

[...]

- Why, yes. At one time we were great friends. It's been a long time since I've seen him. Why do you ask?

- I've just received a very tragic notice.

- This morning, Allen Campbell died by his own hand.

- Why on earth should Allen Campbell...?

- Why, indeed. I thought you might give me a clue.

- He had everything to live for. He was just beginning to achieve a name for himself in science.

- He left no note or letter, no explanation of any sort?

- None. Whatever drove him to it, he took the secret with him.

- How little we really know of what goes on inside a man.

- Yes.

- You've been sad all evening. Is it Allen Campbell?

- Perhaps.

- I'm sorry.

- Let's be married soon, in a fortnight. A simple wedding with only our closest friends.

- A fortnight? You call that soon?

- Good night, darling. I'll come to Selby on Thursday afternoon with Janet.

- I'll be at the station.

[...]